Window Installation Instructions

Here are the instructions I put together for installing my Jeld-Wen windows along with some photos of the process.

  • Allow enough time to finish this project. The first window will likely take 2-3 hours. The remaining windows may require as little as 1 hour each.
  • Rip a piece of siding 3 ½ inches wide to use as a shim and a wedge at the bottom of the window. Cut to the length of the bottom of the window sill.
Ripping Siding

Ripping Siding

  • Check the operation of the window to make sure it opens, closes and locks properly
  • Cut house wrap inside the window into an upside down martini shape.
Upside Down Martini  (bold lines indicate cuts)

Upside Down Martini
(bold lines indicate cuts)

  • Cut the house wrap diagonally up from the upper corners of the window. Peel back and tape up that flap of house wrap. This flap will come back down over the window flashing later.
Tyvek Added

Tyvek Cut and Top Taped Up

  • Place the piece of siding on top of the lower window sill
Cedar Siding at Bottom of Window

Cedar Siding at Bottom of Window

  • Wrap the lower flap of house wrap over the top of the siding.
Tyvek Goes Over Siding

Tyvek Goes Over Siding

  • Place the window the frame on top of the shims. Have somebody inside the house enter the window left and right.
  • Mark the window’s left and right position on the house wrap.
  • Check the bottom of the window for level. Have somebody inside the house place a shim underneath the siding on either corner of the lower window sill and move the shim in and out as necessary to level the window. Some amount of fine tuning can also be done by rotating the piece of siding left or right.
  • When everything is level, mark the location of all the shims and the piece of siding relative to each other and the window sill.
  • If there is house strapping underneath the lower fin of the window fin, then mark the location of the holes in the lower fin.
  • Remove the window from the frame being careful not to disturb the location of the shims or the piece of siding.
  • Nail the piece of siding in place in several places including through the shims.
  • Cut off any protruding shims
  • Staple the left, right and bottom flaps of the house wrap to the inside of the window frame. Cut off any extra hanging inside the house.
  • Where the holes for the lower window fin were marked, drill holes through the outside sheathing and through the house strapping. Use a drill bit the same size as the roofing nails. Be careful not to drill deeper than the length of the nail. If the drill bit is longer than the nail, place a block of wood between the house and the drill to keep from drilling too far in.
  • Cut a piece of flashing 18 inches longer than the bottom of the windowsill. Fold down the first 1½ inch of the backing on this flashing. Install the flashing across bottom of window frame, centered and flush with bottom outside edge of the windowsill with the exposed, sticky part facing up. The bottom half of the flashing will hang loose so it can eventually hang over the top of the siding.
  • Cut a piece of flashing 8 inches longer than the length of the lower window sill. Install the flashing flush with the inside edge of the windowsill, wrapping up the inside of the windowsill on the left and right side and around the outside of the window on the left, right and bottom sides. You may need to make small cuts at the corner in order to fold the flashing down and to the sides. Make these cuts a shallow as possible (don’t cut all the way in to the window frame)
Small Piece at Corner

Small Piece at Corner

Flashing Inside Sill Folded Around Corner

Flashing Inside Sill Folded Around Corner

Lower Flashing Complete

Lower Flashing Complete

  • Run a 3/8” bead of caulk on the exterior wall around the sides and top of the window
  • Run a 3/8” bead of caulk on the exterior wall at the bottom of the window, leaving a 2” gap every 8” (so water can flow down)
  • Place the window back in the frame and double check for level.
  • Nail the bottom of the window using 2 inch galvanized roofing nails
  • Check the sides of the window for level and rack the top of the window left and right as necessary
  • Before finishing the nailing, check the operation of the window to make sure it still opens, closes and locks properly
  • Nail the remaining holes on the left and right side
  • Remove the drip cap from the top of the window
  • Loosely nail the holes on the top fin of the window allowing some space for the drip cap to slide back in.
  • Install flashing on the sides of the windows, extending 2-3 inches beyond the top and bottom of the window. Press down entirely.
  • Press the drip cap over the top fin of the window. Use a block of wood and a hammer to lightly tap it back into place. Finish nailing the holes on the top fin (hammer through the drip cap).
Lightly Hammering Drip Cap in Place

Lightly Hammering Drip Cap in Place

  • Install flashing on the top of the window, extending at least 8-10 inches past the edge of the window.
  • Fold the top flap of the house wrap back over the upper strip of flashing. Trip ~1 ½ inches off the bottom. Tape the flap in place along the top fin of the window and then along the diagonal cut lines using house wrap tape.
  • Your window has now been installed.
Window Installed!

Window Installed!

Advertisements
This entry was posted in Instructions, Windows and tagged , , , , , , . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s